Senders.ai

Overview

Senders.ai is an MCP-connected workspace for planning and running B2B cold-email campaigns from Claude, ChatGPT, and compatible clients. It suits teams sending a deliberate stream of outreach rather than large-scale volume. The approval step preserves human control, but paid plans are required for live prospect discovery and sending.

Key features

The workflow combines prospect research, email drafting, sequence construction, and campaign staging. A user approves messages before dispatch, making the product appropriate when AI should accelerate preparation without taking the final editorial decision.

Connections run through mcp.senders.ai/mcp, with support for Claude desktop and web, ChatGPT desktop, and other MCP-capable clients. A free account checks domains, analyses copy, and stores campaigns, prospect lists, and do-not-contact lists. It cannot find live prospects or send, so it is a planning tier rather than a working outbound system.

Single and Team use customer-owned Gmail or Outlook mailboxes. Team adds a shared suppression list and lets customers connect their own Apollo account for prospect data. Business uses managed SMTP and adds domain and Google Postmaster monitoring plus inbox-placement testing. The product describes warming and deliverability checks, but email warm-up is not included as a plan feature. Reply detection is supported.

Security measures include TLS in transit, application-level AES-256 encryption for stored access tokens and sensitive credentials, password hashing, daily automated backups, and restricted production access. Prospect data and connected mailbox content are not used to build cross-customer datasets, and personal data is not sold. Primary hosting, databases, and backups are in the European Union, although some subprocessors are in the United States.

Pricing

The free account has no card requirement and supports campaign and ICP planning, prospect and suppression-list storage, domain checks, copy analysis, and other preparation work. It excludes sending, live prospect research, and data tools, so it works for evaluating the workflow but not for executing outreach.

Single — $50 a month

Single supports one customer-owned Gmail or Outlook mailbox, 50 emails per day, 500 credits per month, and research, verification, and analysis through MCP. It is the sensible entry point for one operator or a small program that can stay within one mailbox and 50-send daily ceiling. The mailbox and quota make it unsuitable for a broader team or materially higher cadence.

Team — $299 a month

Team covers up to five mailboxes and 250 sends per day total, with 3,000 credits per month, shared suppression and credit pools, an Apollo connection, and concierge onboarding. It fits a coordinated team that needs separate sending capacity and shared controls. The price is substantial, while the aggregate daily cap still favors considered outreach over volume operations.

Business — $667 a month

Business starts with managed SMTP, 200 sends per day, and 7,000 credits per month. Domain and Google Postmaster monitoring and inbox-placement testing target organizations that need more formal deliverability oversight. It is the strongest fit for teams willing to pay for managed sending and monitoring; it is difficult to justify for a single low-volume sender.

Platforms

Senders.ai is offered through web and API access, with MCP connectivity to Claude desktop and web, ChatGPT desktop, and other compatible clients. Its outreach channel is email only. Single and Team require customer-owned Gmail or Outlook mailboxes, while Business supplies managed SMTP.

Who it's for

This is built for B2B teams sending tens to hundreds of considered emails daily, with a person reviewing each message. It suits organizations already working in MCP clients and wanting AI-assisted research, copy, and sequencing. It is not designed for high-volume cold spam, and the paid requirement for live research makes the free tier unsuitable for a complete campaign.

Pros and cons

• Pros: Human approval remains in the sending loop, reducing the risk of unchecked AI copy.
• Pros: MCP support brings campaign work into Claude, ChatGPT, and other compatible clients.
• Pros: Team sharing, Apollo connectivity, and suppression controls support coordinated outreach.
• Pros: Business adds concrete monitoring and inbox-placement testing, while published security and privacy practices address credential and prospect-data handling.
• Cons: Free users cannot research live prospects or send, limiting the no-cost tier to preparation.
• Cons: Single and Team cap each mailbox at 50 daily sends, and Team caps total sending at 250 per day.
• Cons: There is no included email warm-up feature, despite references to warming and deliverability checks.
• Cons: Business costs $667 per month, making its managed infrastructure and monitoring a specialist purchase.

Alternatives

Choose Mixmax instead if you want extension and desktop coverage alongside API and web access, with a free tier capped at 20 tracked emails and 50 sequence recipients monthly. Yesware is a better fit for basic open and attachment tracking, meeting scheduling, and small campaigns, with 10 campaign recipients on its free plan. Pick Apollo when prospect data and sequencing are the priority: its free plan includes 900 credits per seat yearly, two sequences, API access, and one intent topic.

Hunter suits users seeking email discovery and verification with 50 monthly free credits and one connected email account. Mailmeteor is the simpler choice for spreadsheet- and Gmail-oriented sending, offering 500 emails monthly on its free Hobby plan. Outplay offers a free-forever tier with one user, two mailboxes, and 2,000 active prospects monthly. Choose Sequence-R for inbox rotation and up to three connected inboxes on its $16-per-month Individual plan. Salesloft is an alternative for organizations seeking a broader sales-engagement platform with package pricing handled by its sales team.

For a wider comparison, see Email Outreach Software.

Verdict

Choose Senders.ai if your B2B team wants MCP-based campaign assistance, mandatory human approval, and a measured email program with clear mailbox and credit limits. Look elsewhere if you need free sending, built-in warm-up, or high-volume automation; its paid research gate and conservative caps are deliberate constraints, not incidental omissions.